Drafting instrument.



ILA. WEBSTER. DRAFTING INSTRUMENT. APPLICATION FILED FEB. 27. 191'3.y

, 1,072,539, Patented Sept. 9,1918.

* Attqrneys HARRY ALLEN `01'!" LANCASTER, PENNSYLVANIA.

nnnr'rrne INsTnfuMnivT,

Beit known that I, Hanny ALLEN-WEB# siren, a citizen of the UnitedStates,'residi ng Lancaster, in the county of Lancaster and State ofPennsylvania, have 4invented a. new and useful Drafting Instrument, of

which the following vis al specification.

The present invention relates, to improvej ments in draftinginstruments, the primary f object of the inventionbeing thefprovisi-on'l of a means whereby the pencil :or crayon point carried lby one memberof a bow compass or a jointed compass, maybe properly 'j adjustedrelatively to thecentering pin or needle of the. compass, there being'provided a spring clamp for'retaining the penci'lor lcrayon against thenormal tendencyto slip upwardly during the manipulation of theinstrument, and there further being prothe upper end of the pencil'orcrayon to pro-- vided an adjustable stop for coaction with ject the samewhennecessary and alsotoassist in limiting the upward movementtheremanipulation of the instruin thescope of what is claimed withoutde-v parting from the spirit of theinvention.

In the drawin s-Figure 1 is a side elevation of a spring ow compass withthe presentinvention'applied thereto. Fig. 2 is a side elevation of ajointed connection of a jointed compass with the present invention aplied thereto. Fig. 8 is a sideA elevation ci) the crayon holding clipand adjusting de*- vice onA an enlarged scale. Fig. 4 is a bottom planview thereof. Figs. 5, 6 and 7 are views of a modified formof pencil orcrayon adjusting mechanism.

.Referring to the drawings, andmore particularly to Figs. 1, 2, 3 and 4,thenumeral.

1 designates the center carrying member of the instrument, and 2 thecenter needle, the same being of usual construction, while the member 3thereof is provided with the clon! ated spring terminal 4 which coasts.with t e short spring terminal 5, both of said terminals beingspaced'apart 'as' at 6, 4, to i specification of Letters Patent.Application mea reti-i1 ary 27,1913.

Serial No. 751,180.

' provide 'the crayon receiving recesses 7 and 8, .satd terminals 4 and5 barring a normal `ten-sion towardeachother so as-ito'retam the crayon9 in the desired clamped position. This -clip or rclamp` holds the'crayon 9 so that the ispermitted the necessaryI movement 'whenadjusting the same but under normal conditions is .held .againstlongitudinal movement.

In orderfto provide a vmeans for .adjustimtentedls'ept-e,1913.

in g the crayon 9 longitudinally within .the l clip, 'a supporting plate10 is connected to the outerend of the long terminal 4 and.

'carries the threadedgshank or. screw 4'11,

which is disposed parallel to the `crayon 9,

milled adjustingdisk or nut 12, which is .disposed to have a portionthereof as at 13 abut the upper `end ofthe crayon 9 and thus provideameans to limit.l the upward movement vof the crayon during themanipulation of the instrument and at the same time provide.- a meanswhereby when the disk is rotated to move downwardly' upon the screw 11,to project the pointed end of the crayon after the same is worn,'thusproviding a' meansto place the writing end the same having mountedthereupon the of the crayon 9 in the desired relation to j the centeringneedle 2, without the necessity of adjusting the needle-2 asis the usualpractice. Thus the needle 2 may be retained at the desired adjustment atalltimes, and the disk 12 may be manipulated to give the properprojection to the writing point of the crayon 9.v j

In the form of instrument shown in Figs. 5, 6 and 7, the members 1-5and16 carrving theclamping members 17 `and 18, are

normally' spaced but are moved "to and fro1n each other by means of theheaded screw 19,

yas clearly illustrated in Fig. 7. Thus the pencil or crayon 9 isroperly positioned' between the members 1l) and 18 while the` receivingscrew 20 which corresponds to the screw 11 is attached toi the member.18 through the medium of the threaded shank and nut 21.- Upon the screw20 -is disposed la disk 4(not shown) similar to the disk 12 and thecrayon 9 is held against outward movement in a. simila'rvmanner to thestructure heretofore described, andis projected by the manipulation ofasimilar disk.

The `present invention contemplates the of compass, thereby. providing ameans use of the screw 11 anddisk 12 on any form no v Copies of thispatentmay be obtained for veeents each, by addressing the Commissionerof Patents,

Washington, D. C.

whereby the/lead or crayon 9 is adjusted as worn without the necessityof changing the centering point 2;

Tha-t is yclaimed is:

1. A drafting instrument, crayon holder and adjusting device, includinga friction clip for the crayon, a screw carried by lthe clip anddisposed parallel to the crayon when in the clip, and a disk v threadedupon the screw and project-ing to engage t-he upper end of the crayon inthe clip to feed the crayon through the clip in one direction and tohold the crayon against retraction in the opposite direction.

Q. A drafting inst1ument, having a crayon holder and adjusting device,includhaving a A clip in one ing a friction clip for normally retainingthe crayon against longitudinal movement, al screw carried bythe clip,and a disk threaded upon thel screw and projecting'to engage the upper,end of the crayon while inthe. clip to feed the crayon through tliedirection and to hold the crayon against retraction in the oppositedirection.

In testimony that I claim t-he foregoing as my own, I have heretoaffixed my signature in the presence of two lwitnesses.

HARRY ALLEN WEBSTER. l

lVit-nesses: l

WM. P. ERISMAN,

J. ARTHUR Sworn.

